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Batteries and Fuel Cells03:12

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Related Experiment Video

Updated: May 15, 2025

High Temperature Fabrication of Nanostructured Yttria-Stabilized-Zirconia YSZ Scaffolds by In Situ Carbon Templating Xerogels
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High-Entropy Spinel Oxide Nanostructures as Stable Cathodes for Solid Oxide Fuel Cells.

Zhaohui Chen1, Ben Ma2,3, Chen Dang1

  • 1Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, China.

Nano Letters
|April 9, 2025
PubMed
Summary

High-entropy spinel oxide nanoparticles offer a novel solution for stable solid oxide fuel cell (SOFC) cathodes. This research demonstrates their potential to overcome particle coarsening and enhance long-term performance in SOFC energy conversion.

Keywords:
A-site High-entropyCathodeLong-term stabilityNanostructureSolid Oxide Fuel Cells

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Conversion

Background:

  • Solid oxide fuel cells (SOFCs) are promising for clean energy but face cathode material stability challenges.
  • Nanostructured cathodes often degrade via particle coarsening, limiting SOFC performance and lifespan.
  • Developing robust cathode materials is crucial for advancing efficient chemical-to-electrical energy conversion.

Purpose of the Study:

  • To develop stable and high-performance cathode materials for SOFCs.
  • To investigate the use of high-entropy spinel oxides to prevent nanoparticle degradation.
  • To explore the impact of nanostructure engineering on cathode stability and efficiency.

Main Methods:

  • Fabrication of high-entropy spinel oxide (Mg0.2Fe0.2Co0.2Ni0.2Cu0.2)Fe2O4 (MFCNCF) nanoparticles using an impregnation method.
  • Loading MFCNCF nanoparticles onto a porous Ce0.9Gd0.1O1.95 (GDC) skeleton.
  • Characterization of cathode performance and stability at 800 °C.

Main Results:

  • The optimized cathode with 30 wt% MFCNCF loading exhibited a low polarization resistance of 0.12 Ω·cm².
  • A maximum power density of 1063.94 mW·cm⁻² was achieved at 800 °C.
  • The high-entropy nanoparticles maintained their microstructure over 240 hours, showing negligible performance degradation due to entropy stabilization.

Conclusions:

  • High-entropy spinel oxides combined with nanostructure engineering offer a viable strategy for developing stable SOFC cathodes.
  • The entropy stabilization effect is key to preventing particle coarsening and ensuring long-term cathode performance.
  • This approach significantly advances the potential of SOFCs for efficient and environmentally friendly energy generation.